That's often recommended for people with especially large, heavy breeds -- Brahmas and Jersey Giants in particular.
IMO, it's more important to make sure that there is enough horizontal distance for them to fly up and down without crashing into anything. They fly at roughly a 45-degree angle.
When I had a Brahma, who was too heavy to fly, I gave her a ramp to get up and down to the nests and the perch.
I figure that if I give them flying space, a ramp, and plenty of bedding then I can safely accommodate my arthritis and cull any birds who aren't able to thrive in my management system.